Immersive Colonography allows medical professionals to navigate inside the intricate tubular geometries of subject-specific 3D colon images using Virtual Reality displays. Typically, camera travel is performed via Fly-Through or Fly-Over techniques that enable semi-automatic traveling through a constrained, well-defined path at user-controlled speeds. However, Fly-Through is known to limit the visibility of lesions located behind or inside haustral folds. At the same time, Fly-Over requires splitting the entire colon visualization into two specific halves. In this paper, we study the effect of immersive Fly-Through and Fly-Over techniques on lesion detection and introduce a camera travel technique that maintains a fixed camera orientation throughout the entire medial axis path. While these techniques have been studied in non-VR desktop environments, their performance is not well understood in VR setups. We performed a comparative study to ascertain which camera travel technique is more appropriate for constrained path navigation in Immersive Colonography and validated our conclusions with two radiologists. To this end, we asked 18 participants to navigate inside a 3D colon to find specific marks. Our results suggest that the Fly-Over technique may lead to enhanced lesion detection at the cost of higher task completion times. Nevertheless, the Fly-Through method may offer a more balanced trade-off between speed and effectiveness, whereas the fixed camera orientation technique provided seemingly inferior performance results. Our study further provides design guidelines and informs future work.
翻译:光线共聚层让医疗专业人员能够使用虚拟现实显示,在3D主题特定结肠图像的复杂管状地貌内游览。 通常, 摄影旅行是通过Fly- Through或Fly-Over技术进行的, 能够以用户控制的速度通过一个固定的、定义明确的路径进行半自动旅行。 然而, Fly-Trom已知, 限制位于后面或下角内部的损伤的可见度。 同时, Fly-Over需要将整个结肠线直观化成两个特定的半径。 在本文中,我们研究了隐蔽的Fly- Through和Fly-OVer技术对腐蚀检测的影响,并引入了一种摄像旅行技术, 在整个介质轴路径路径上保持固定的摄像方向。 虽然这些技术在非VR的桌面环境中已经研究过,但其性能在VRtrc 折叠体内并不十分清楚。 我们进行了一项比较研究,以确定哪些摄像旅行技术更适合Immers Colental 导航受到的制约, 并且与两个放射学家鉴定我们的结论结论。 为此, 我们要求18个解剖面技术参与者可以更精确地在内部测算法的进度设计中进行更高级的研究。